Hoklo-Chinese or Hakka-Chinese ancestry?

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Are the Cojuangcos of Hoklo-Chinese or Hakka-Chinese ancestry? Why the Cojuangco always claim that they are of Hakka ancestry?

"It all began when Ko Guiok Huang, an ethnic Hakka from Fukien, China, emigrated to the Philippines in 1871." http://filipinojournal.com/our-columnist/perezcope/the-conjuangco-wars